kolibrios/programs/cmm/lib/mem.h
Kirill Lipatov (Leency) 2793582a69 HTMLv: safe string copy
git-svn-id: svn://kolibrios.org@3128 a494cfbc-eb01-0410-851d-a64ba20cac60
2012-12-19 17:37:24 +00:00

195 lines
3.1 KiB
C

dword mem_init()
{
$push ebx
$mov eax, 68
$mov ebx, 11
$int 0x40
$pop ebx
return EAX;
}
dword malloc(dword size)
{
$push ebx
$push ecx
$mov eax, 68
$mov ebx, 12
$mov ecx, size
$int 0x40
$pop ecx
$pop ebx
return EAX;
}
stdcall dword realloc(dword mptr, size)
{
$push ebx
$push ecx
$push edx
$mov eax, 68
$mov ebx, 20
$mov ecx, size
$mov edx, mptr
$int 0x40
$pop edx
$pop ecx
$pop ebx
return EAX;
}
dword free(dword mptr)
{
$push eax
$push ebx
$push ecx
$mov eax, 68
$mov ebx, 13
$mov ecx, mptr
$test ecx, ecx
$jz end0
$int 0x40
@end0:
$pop ecx
$pop ebx
$pop eax
return 0;
}
inline fastcall memmov( EDI, ESI, ECX)
{
asm {
MOV EAX, ECX
CMP EDI, ESI
JG L1
JE L2
SAR ECX, 2
JS L2
REP MOVSD
MOV ECX, EAX
AND ECX, 3
REP MOVSB
JMP SHORT L2
L1: LEA ESI, DSDWORD[ ESI+ECX-4]
LEA EDI, DSDWORD[ EDI+ECX-4]
SAR ECX, 2
JS L2
STD
REP MOVSD
MOV ECX, EAX
AND ECX, 3
ADD ESI, 3
ADD EDI, 3
REP MOVSB
CLD
L2:
}
}
#define mem_Alloc malloc
#define mem_ReAlloc realloc
#define mem_Free free
#define mem_Init mem_init
/*:void fastcall memsetz( EDI, ECX)
{
asm {
XOR EAX, EAX
MOV EDX, ECX
SHR ECX, 2
REP STOSD
MOV ECX, EDX
AND ECX, 3
REP STOSB
}
}
:void fastcall memset( EDI, ECX, AL) //copy AL to EDI of ECX num (void *dest, size_t, char c )
{
asm {
MOV AH, AL
MOVZX EDX, AX
SHL EAX, 16
OR EAX, EDX
MOV EDX, ECX
SHR ECX, 2
REP STOSD
MOV ECX, EDX
AND ECX, 3
REP STOSB
}
}
:void fastcall memsetd( EDI, ECX, EAX)
{
asm {
REP STOSD
}
}
:void fastcall memcpyd( EDI, ESI, ECX)
{
asm {
REP MOVSD
}
}
:void fastcall memmov( EDI, ESI, ECX)
{
asm {
MOV EAX, ECX
CMP EDI, ESI
JG L1
JE L2
SAR ECX, 2
JS L2
REP MOVSD
MOV ECX, EAX
AND ECX, 3
REP MOVSB
JMP SHORT L2
L1: LEA ESI, DSDWORD[ ESI+ECX-4]
LEA EDI, DSDWORD[ EDI+ECX-4]
SAR ECX, 2
JS L2
STD
REP MOVSD
MOV ECX, EAX
AND ECX, 3
ADD ESI, 3
ADD EDI, 3
REP MOVSB
CLD
L2:
}
}
:long fastcall memcmp( ESI, EDI, ECX)
{
asm {
MOV EAX, ECX
SHR ECX, 2
REPE CMPSD
MOV ECX, EAX
AND ECX, 3
REPE CMPSB
XOR EAX, EAX
XOR ECX, ECX
MOV AL, DSBYTE[ ESI-1]
MOV CL, DSBYTE[ EDI-1]
SUB EAX, ECX
}
}*/
/*#define memzset memsetz
#define memset0 memsetz
#define mem0set memsetz
#define memset32 memsetd
#define memcpy32 memcpyd*/